Operational Interface Procedures for the South Pole TDRSS Relay ...

4.4 STDN Network Directive
4.4.1 Purpose
This procedure describes the usage, coordination, transmission, and acknowledgment of STDN
Network Directives (SND).
4.4.2 Participants
a. WSC SS.
b. NCC.
1. ND.
2. TM.
4.4.3 Procedure
4.4.3.1 General
a. An SND is used by the NCC to provide operational direction for general support and
specific missions prior to the issuance of ISI 001, and for special activities that are not
mission-related. SNDs may be use for, but are not limited to, issuing operations
instructions, authorizing tape shipments, approving unique equipment
installation/modification, and approving temporary mission-critical equipment
configurations or changes (installation or removal),
b. All SNDs are originated by the NC and issues in sequential order commencing with 001.
SND become effective on receipt and expire after 60 days, or sooner if indicated on the
expiration line. SNDs may also terminate on completion of action, as indicated on the
expiration line of test. SNDs that are not self-canceling may be canceled by another
SND.
4.4.3.2 Transmission and Acknowledgment
a. SND content is verbally coordinated between the TM and SS prior to transmission.
b. The WSC SS acknowledges the SND by transmitting an Acknowledge message to the
TM.
a2302s4 4-4 532-OIP-NCC/SPTR